The California-based technology giant is set to host a big event Tuesday in which it is expected to announce and launch a slew of new devices. This includes the Daydream virtual reality headset, the Google Home connected home hub, and the Pixel, a new smartphone that comes in two sizes.

In the run-up to the launch, pretty much every possible detail about the Pixel phones has purportedly been leaked in advance. None of this has been officially confirmed, but this is what people are saying:

It will come in two sizes: the Pixel and the Pixel XL. The smaller one is believed to measure about 5 inches.

It'll be made of aluminium and glass.

It's being made by HTC, to Google's specifications.

The camera on the back is 12 megapixels, while the selfie snapper is 8 megapixels.

It'll run Android 7.0 Nougat, the latest version of Google's mobile operating system.

There have also been reports (via Android Police) that Google will be building its own software layer on top of Android, similar to what other Android phone makers like Samsung do. Historically, Google's flagship phones have just offered the pure, "stock" Android experience — but it sounds as if a change might be in store.

At a guess, this supplemental software will be what Verizon is calling "Google Magic" in accidentally leaked product listings of the new phones, which Gizmodo first spotted.

Google hasn't been commenting on the leaks and rumours ahead of the big reveal, so don't expect any early answers from the company on Google Magic.

But it's now only hours until we'll know the truth. The event will be held at 9 a.m. Pacific Time (noon ET, or 5 p.m. in the UK).